Unochinja kuti RFID reader inonzwisisika sei nesarudzo yega yega yekugadzira. Kwaunoisa antenna uye zvikamu zvinosarudza kuti muverengi anowana sei uye anotaura sei nematagi. Dhizaini ye antenna inochinja kuti inogona kuverenga kure zvakadii uye kuti inogona kuverenga zvakadii. Linear polarization inogona kurasikirwa nemasaini kana matagi asina kurongeka. Circular polarization inoshanda zvirinani kunyangwe matagi ari pamakona asinganzwisisike. Sarudzo dzedhizaini dzakakosha zvikuru pedyo nesimbi kana mvura.
Simbi inorova zviratidzo uye inoita kuti nzvimbo dzekuverenga dziome kufanotaura.
Mvura inonwisa simba reRF uye inoita kuti zviome kuverenga ma tag pazvinhu zvakanyorova.
Unogona kuona matambudziko aya mukushandiswa kweRFID kakawanda. Dhizaini yakanaka inobatsira sisitimu kushanda zviri nani uye inoita kuti ive yakavimbika.
Zvitsva Zvitsva
Kugadzirwa kweAntena kwakakosha zvikuru pakunzwisisa RFID reader. Sarudza saizi yakakodzera uye chimiro chakakodzera kuti zvive nani pakukura uye kurongeka.
Kurongeka kwakanaka kwekutevera uye nzira yekufambisa kunoita kuti zviratidzo zviwedzere kusimba. Shandisa zviratidzo zvakakura uye usashandise makombama akapinza kumisa kurasikirwa kwezviratidzo.
Nzira dzakanaka dzepasi dzinoderedza ruzha nekukanganisa. Shandisa mapuraneti epasi anoenderera mberi uye macapacitor ekuparadzanisa kuti uwane mhedzisiro iri nani.
Gadzirisa polarization ye antenna negwara re tag. Iyi match inobatsira kuverenga nemazvo, kunyanya kana zvinhu zvichifamba.
Edza dhizaini yako mumamiriro ezvinhu chaiwo. Izvi zvinowana matambudziko nekukurumidza uye zvinoita kuti RFID system ishande zvakanaka.
Sarudzo dzeMagadzirirwo Dzinokanganisa Kunzwisisa kweRFID
Nguva dzese paunosarudza dhizaini, unochinja kuti RFID reader inonzwisisika sei. Maitiro aunoita kurongeka kwematrace, kupwanya bhodhi, uye kuisa antenna anokanganisa mashandiro anoita system. Kana ukashandisa PCB design yakanaka , unogona kuita kuti system ishande zvirinani, ive yakarurama, uye yakachengeteka. Ngationei kuti sarudzo idzi dzinokosha sei muhupenyu chaihwo.
Trace Layout uye Routing
Kurongeka kwetrace uye nzira yekufambisa masaini kwakakosha pakufamba kwemasaini muRFID system yako. Nzira isina kunaka yekufambisa masaini inoita kuti masaini asashande zvakanaka uye inoderedza huwandu hwekuverenga. Unofanira kuronga upamhi hwetrace uye nzvimbo yekuparadzanisa nekungwarira. Nzira dzakafara dzinoreva kushomeka kwekudzivirira uye kuwedzera kwekuwedzera. Nzvimbo yakanaka inomisa kugona kwakawedzerwa uye inobatsira kunyatsorongeka.
Heino tafura ine ma parameter ekutevera eRFID reader circuits:
Parameter | Yakakurudzirwa Range | Notes |
|---|---|---|
Trace wide | 0.2-1.0 mm | Yakafara = kushomeka kwakaderera = Q yakakwira |
Nzvimbo yekutevedzana kwekutevera | 0.2-0.5 mm | Nzvimbo yakakura = kugona kwezvipembenene zvishoma |
Usashandise makomba akapinza e90° mumatanho ekutevedzana. Shandisa makona e135° kuderedza kurasikirwa kwechiratidzo. Isa maantenna kure nematara edhijitari kuti umise kupindirana. Kuronga kwepair yakasiyana kunobatsira matara ekukurumidza. Unogona kufananidza hurefu nenzvimbo kuti matara echiratidzo arambe akaenzana. Kuronga kwepair kunokosha zvikuru mukugadzirwa kwetara yeUHF RFID. Kana ukatevedzera mitemo iyi, unowana kushanda kwakanaka uye kuchengetedzeka.
Zano: Dzora marongero ekumhanya kwepamusoro uchishandisa makona akakombama akakosha. Izvi zvinomisa matambudziko ekudzivirira uye zvinoita kuti RFID system yako irambe yakasimba.
Grounding uye Power Distribution
Kuisa pasi uye kugoverwa kwesimba zvinoshandura ruzha uye hunhu hwemasaini muRFID system yako. Kuisa pasi kwakanaka kunodzivirira maseketi kubva pakukanganiswa kwemagetsi. Unogona kushandisa macase esimbi nemaplane epasi kuderedza ruzha muUHF neLF RFID systems.
Heano maitiro akanakisa ekuisa pasi uye kugoverwa kwesimba:
Maitiro Akanyanya | tsananguro |
|---|---|
Ruzha rwakaderera uye kupindira , zvichiita kuti masaini ave nani pamafrequencies akakwira. | |
Decoupling Capacitors | Chengeta simba rakagadzikana uye misa shanduko dzemagetsi dzinokanganisa masaini. |
Gadzirisa Kugadzika kweComponent | Zvikamu zvinosungirirwa pamusoro zvine kubatanidza ne-in-pad kana thermal relief kune pasi. |
Ground Planes | Ndege dzepasi dzinoramba dzichidzivirira ruzha. Ndege dzakawanda dzepasi dzinoita kuti pasi pave nesimba. |
Isa ma capacitor ekuparadzanisa pamagetsi. Izvi zvinoderedza ruzha rwemagetsi uye zvinosimudzira mashandiro. Mazhinji ma grounding vias ari pedyo nezvikamu zvakakosha anocheka ruzha rwekusvetuka pasi. Ma Carrier Noise Reduction modules anokiya masaini uye anoderedza ruzha rwekudonha kwemvura. Sarudzo idzi dzinokubatsira kuchengetedza kururama uye kuchengetedzeka muma RFID reader circuits.
Cherechedza: Kudzika zvakanaka kunodzivirira macircuit e oscillator ne demodulator kubva pakukanganiswa kwemagetsi. Izvi zvakakosha zvikuru pamhando yemasaini uye huwandu hwekuverenga.
Kugadzira uye Kutungamira MaAntena
Dhizaini uye kurongeka kweantenna ndizvo zvakakosha pakunzwa kweRFID. Saizi yeantenna, chimiro, uye nzvimbo yayo zvinoshandura kuti muverengi anotaura sei nematagi. Kana ukasaronga antenna zvakanaka, kunzwa uye huwandu hwenhare zvinodzikira. Unofanira kufananidza antenna polarization nekutarisa kwetag kuti uwane mhedzisiro yakanaka.
Dhizaini yeantena inochinja mhinduro yema frequency, input impedance, uye gain.
Kuisa maantenna pedyo nesimbi kunogona kukanganisa masaini uye kuderedza kunyatsorongeka.
Kushandisa maantenna akawanda kunogona kufukidza nzvimbo yakawanda asi kunoda kugadziriswa nokungwarira kuti kurege kukanganisa.
Sarudza antenna yakakodzera zvaunoda zveRFID. Muhurongwa hweUHF, kugadzika kweantenna uye gwara zvinonyanya kukosha. Unogona kuwedzera mashandiro nekuisa ma antenna mumutsara ne tag polarization. Kana ukachengeta ma antenna kure nema digital traces, unomisa kupindira. Sarudzo idzi dzinokubatsira kuwana tekinoroji yeRFID yakavimbika uye kuchengetedzeka kuri nani.
Kushevedzera: Antena ne microchip dhizaini zvinochinja mhinduro uye kuwedzera kwefrequency. Kesi uye kwaunoshandisa sisitimu zvinokanganisawo mashandiro anoita RFID yako.
Unogona kuona kuti sarudzo yega yega yedhizaini inochinja sei mashandiro anoita RFID reader yako. Kana ukashandisa nzira dzakanakisisa mu trace layout, grounding, uye antenna setup, unowana kururama kuri nani, kuverenga kuri nani, uye kuchengetedzeka kuri nani mune ese maRFID systems.
Kuwanda uye Polarization muRFID Design
Kururama kweMashandiro Ekushanda
Zvakakosha kuchengetedza frequency yekushanda yakadzikama mune yega yega RFID system. Frequency inodzora kuti muverengi wako anotaura kusvika papi uye zvakanaka sei nematagi. Kana frequency ikachinja, huwandu hwekuverenga uye kurongeka kunowedzera kuipa. Kurongeka kwePCB nezvinhu zvinobatsira kuchengetedza frequency yakadzikama nekufamba kwenguva uye nekuchinja kwetembiricha. Unogona kuona izvi mutafura iri pazasi:
Kuonekwa | Tsanangudzo |
|---|---|
Frequency Kugadzikana | Zvinhu zvePCB uye marongerwo azvo zvinobatsira kuchengetedza mafrequency akadzikama sezvo nguva netembiricha zvichichinja. |
Kuderedza Kupindira | Kurongeka kwePCB kwakakosha zvikuru kuderedza kukanganiswa uye kuve nechokwadi chekuti RFID reader ne tag zvinonzwika zvakanaka. |
Unofanira kugara uchitarisa dhizaini yako kuti uve nechokwadi chekuti frequency inoramba yakadzikama. Izvi zvinobatsira tekinoroji yako yeRFID kushanda zvirinani mumamiriro ese ezvinhu.
Kupatsanurana kweAntena uye Kutungamira kweTag
Kupokana kweAntena ndiko mafambiro anoita mafungu eredhiyo. MuRFID, unofanirwa kufananidza pokana yeantenna nemafambiro etag. Kana ukashandisa linear polarization, tag nereader antennas zvinofanira kutarisana nenzira imwe chete. Kana zvikasadaro, unorasikirwa nesignali uye range. Musiyano wemadhigirii makumi mapfumbamwe unogona kuita kuti mashandiro awedzere kuipa. Kupokana kwedenderedzwa kunokutendera kuti uverenge matags chero kupi. Izvi zvakanaka kana matags achifamba kana kugara pamakona akasiyana.
Zano: Tarisa kwakanangana netag . Ita shuwa kuti polarization yetag antenna inoenderana nemuverengi. Izvi zvinokubatsira kuti uverenge matag zviri nani uye nemazvo.
Unogona kushandisa denderedzwa polarization muUHF RFID kuti uverenge ma tag munzvimbo dzakawanda. Izvi zvinoita kuti system yako ishande zviri nani uye igare yakachengeteka.
Kuve nechokwadi chekuti mashandiro anoitwa kakawanda
Unofanira kutevedzera matanho akanaka kuti RFID system yako irambe ichishanda nema frequency akakodzera. Heano mamwe matanho aunogona kushandisa:
Sarudza zvinodiwa neapp yako. Sarudza bhendi rema frequency akakodzera, nzvimbo yekuverenga, uye rudzi rwe tag.
Sarudza rudzi rweantenna rwakanakira kushandisa. Sarudza kubva pa antenna dze dipole, loop, kana patch.
Tarisa saizi nechimiro cheantenna kuti zvienderane nesystem yako.
Tarisa zvinhu zvemagetsi zvakaita se gain, impedance matching, uye polarization.
Edza dhizaini yako muhupenyu chaihwo. Shandisa masimulation uye chinja kana zvichidikanwa.
Ramba uchivandudza dhizaini yako kuti uwane mhedzisiro iri nani uye kuchengetedzeka.
Masisitimu eUHF RFID anoda kunyatsotarisirwa kuti awane gwara uye atungamirire. Magadzirirwo akanaka eantenna nePCB zvinokubatsira kuti uwane kururama kuri nani uye huwandu hwekuverenga. Unogona kushandisa matanho aya kuti uwane mhedzisiro yakanakisa kubva kuRFID tekinoroji yako mumashandisirwo ese.
Kutarisira Kuvimbika kweSignali uye Ruzha
Kuvimbika kwemasaini uye kudzora ruzha zvakakosha zvikuru kune masisitimu eRFID. Kana uchida kuti muverengi wako weRFID ashande zvakanaka, unofanirwa kudzora kurasikirwa kwemasaini uye kupindira. Mhedzisiro yemaparasitic inogonawo kuchinja kuti RFID yako inoshanda kusvika papi uye zvakanaka sei. Zvinhu izvi zvinogona kukanganisa huwandu, kuwedzera, uye kuti RFID yako yakavimbika sei mumashandisirwo akawanda.
Kuderedza Kurasika Kwechiratidzo
Unogona kurasikirwa nechiratidzo kana ukasagadzira system yako yeRFID zvakanaka. Dhizaini yeantenna isina kunaka kana masaini asina simba anogona kuita kuti matag awane simba shoma. Madaro marefu anoderedzawo chiratidzo. Kuti urambe wakasimba, shandisa antenna yakanaka uye simba rekudzora. Isa matag kure nezvinhu zvinovhara masaini. Sarudza frequency yakakodzera yeuhf zvinoenderana nezvaunoda. Kudzora impedance muPCB layout kunobatsira kumisa kuratidzwa kwechiratidzo. Mafambiro mapfupi uye kushandisa ma resistors kumagumo kunobatsira kuderedza kurasikirwa kwechiratidzo.
Kuderedza EMI neCrosstalk
Kupindirana kwemagetsi nemagetsi uye kutaura kwemagetsi (crosstalk) matambudziko akajairika muhurongwa hwe uhf rfid. Matambudziko aya anogona kuderedza huwandu hwemagetsi uye kukonzera njodzi dzekuchengetedza. Unogona kushandisa zvidimbu zvemhangura nemafirimu ekudzivirira kupindira kwemagetsi (copper layers ) kudzivirira EMI. Mapurani epasi anobatsirawo kumisa kupindira. Isa machira pamusoro pezvikamu zvinonzwa ruzha. Shandisa machira ekufambisa magetsi pakugadzira madiki. Kuburikidza nekusona uye kubvisa mapurani epasi, rubatsiro zvakare. Chati iri pazasi inoratidza kuti EMI inokanganisa sei masystem akasiyana e rfid:
Zano: Tarisa system yako nguva nenguva uye dzidzisa vashandi. Izvi zvinokubatsira kuwana nekugadzirisa matambudziko eEMI nekukurumidza.
Kutarisira Kugona Kwezvipukanana uye Kupinda Kwezvinhu Mukati
Kukwanisa kupinza simba remagetsi (parasitic capacitance) uye inductance zvinogona kuderedza huwandu uye kuwedzera kwemuverengi wako weRFID. Shandisa dhizaini yakafanana yemaantenna kuti simba remagineti rirambe rakafanana. Ita kuti kureba kwematrace kuenzane uye kuenzanisa impedance pakati pema differential pairs. Shandisa ma capacitor akasiyana pamwe chete kuchenesa tambo dzemagetsi. Isa ma capacitor pedyo nemapini emagetsi uye chengeta macurrent loops madiki. Usaise mapuraneti epasi pasi pema coils. Shandisa mapuraneti epasi akapatsanurwa kuti uchengetedze hunhu hwemhando yepamusoro. Matanho aya anobatsira system yako yeRFID kuti irambe yakavimbika uye yakachengeteka mukushandiswa kwese.
Zvikanganiso Zvakajairika Zvekugadzira uye Maitiro Ekuzvigadzirisa
Paunenge uchigadzira RFID reader, unogona kuita zvikanganiso zvinoderedza kuti inogona kuverenga kusvika papi, kuti yakarurama sei, uye kuti yakachengeteka zvakadii. Unogona kudzivirira matambudziko aya nekunzwisisa kuti mapuraneti epasi, dziviriro, uye kuiswa kweantenna zvinokanganisa sei mashandiro eRFID.
Kugadzika Kwendege Yakaipa Pasi
Nzvimbo yepasi inopa muverengi wako nzvimbo yekunongedzera yakagadzikana . Kana ukasaigadzira nemazvo, masaini anogona kusvetuka-svetuka uye simba shoma rinopinda. Izvi zvinoita kuti RFID ipfupike. Nzvimbo yepasi yakanaka inobatsirawo kudzora kupararira kwemasaini uye kuenzana ne impedance. Chengeta ma antenna traces ari kure ne 10mm kubva pasi kuti usabva pa ground plane . Gara uchitevera datasheet yehukuru hwe ground plane. Kana tag yako iri pedyo nesimbi, nzvimbo yepasi inogona kubatsira kuderedza mhedzisiro yezvakatipoteredza pamhinduro ye tag.
Mistake | Chii Chinoitika | Nzira yekugadzirisa sei |
|---|---|---|
Hapana nzvimbo yakakwana kubva pasi | Madonhwe eantenna ari pedyo zvakanyanya anogona kukonzera kuvharika. | Chengeta nzvimbo inosvika 10mm kuti ushande zvakanaka. |
Kuregeredza migumisiro ye substrate | Zvinhu zviri pasi zvinoshandura kurira kwe antenna. | Shandisa zvinhu chaizvo zvinokosha pakuverenga nekuenzanisa. |
Zano: Shandisa purani yepasi inoramba ichienderera mberi uye dzivisa kupindirana kwepuratifomu dzePCB dzine mapuranga akawanda. Izvi zvinoita kuti muverengi wako agare akasimba uye zvinovandudza nzvimbo yekuverenga.
Dhizaini Isina Kusimba Yekudzivirira uye Yekuvharira
Kudzivirira kunoita kuti ruzha rwekunze rusasvike kure nemuverengi wako. Kana ukasagadzira nzvimbo yacho zvakanaka, zviratidzo zvinogona kubuda nepaburi kana maburi. Maburi makuru anogona kurega zviratidzo zvichibuda uye kuita kuti RFID isashande zvakanaka. Chengeta maburi madiki uye shandisa mashoma sezvinobvira. Tarisa majoini nemaseam ari munzvimbo yacho. Nzvimbo yakanaka inoita kuti system yako ive yakachengeteka uye inodzivirira kubva pakukanganiswa.
Kuregeredza Kuiswa kweAntenna uye Kutungamirirwa
Kwaunoisa antenna uye maitirwo ayo kwakakosha zvikuru. Kana ukaisa antenna panzvimbo isiriyo kana kuti usingafungi nezvekwairi, huwandu hwenzvimbo uye kurongeka kwayo zvinodzikira. Isa antenna pedyo nemupendero kana kona yePCB kuderedza kupindira. Usaise antenna pamusoro pemapurani epasi kana simbi. Paunenge uchiyedza, edza nzvimbo dzakasiyana pamativi marefu kana mapfupi ebhodhi. Kuti uwane mhedzisiro yakanaka, paradzanisa antenna dzinoshandisa ma frequency akafanana uye udzitenderedze pa 90 degrees. Gara uchisiya nzvimbo yekubatanidza impedance uye isa ma matching network padyo ne antenna. Izvi zvinokubatsira kuti uwane huwandu hwakanakisa uye kuchengetedzeka kubva kumuverengi wako.
Kudanwa: Gara uchiyedza sisitimu yako mumamiriro ezvinhu chaiwo, kwete murabhoritari chete. Izvi zvinokubatsira kuwana matambudziko anokonzerwa nezvinhu nemagadzirirwo usati wapedza dhizaini yako.
Dhizaini yebhodhi rako redunhu yakakosha zvikuru pakunzwa kweRFID reader. Unofanira kufunga nezvekwaunoisa antenna. Maitiro aunoita antenna anobatsirawo. Kurongeka kwePCB kunobatsira muverengi kuwana ma tag zviri nani. Ita shuwa kuti frequency inoramba yakadzikama. Tarisa polarization uye dzora ruzha kuti system ishande zvakanaka. Edza dhizaini yako kakawanda uye gadzirisa matambudziko nekukurumidza. Shandisa zvinhu zvinorasikirwa nesimba shoma, senge Rogers 4350B kana PTFE-based laminates. Ita kuti kurongeka uye impedance zvive nani. Edza nzira dzepamusoro dzekuvaka bhodhi rako. Matanho aya anobatsira maRFID system ako kushanda zvakanaka.
FAQ
Chii chinonyanya kukosha pakunzwa kweRFID reader?
Unofanira kutanga watarisa dhizaini yeantenna. Saizi yeantenna, chimiro, uye kwaunoiisa ndizvo zvinosarudza kuti muverengi wako anowana sei ma tag. Kusarudza antenna yakanaka kunokubatsira kuti uwane mutsetse wakanaka uye kururama kuri nani.
Zvinhu zvePCB zvinokanganisa sei mashandiro eRFID?
Zvinhu zvePCB zvinoshandura kufamba kwemasaini. Kana ukashandisa zvinhu zvemhando yepamusoro zvakaita seRogers 4350B, unorasikirwa nemasaini mashoma. Izvi zvinoita kuti RFID reader yako ishande zviri nani, kunyanya pamafrequencies akakwira.
Ndingaisa antenna chero kupi paPCB here?
Kwete, haugone kuisa antenna chero kwaunoda. Ichengete kure nesimbi nepasi. Isa pedyo nemucheto webhodhi kuti uwane mhedzisiro yakanaka.
Sei kugadzira pasi kuchikosha mukugadzirwa kweRFID?
Kuisa pasi zvakanaka kunoderedza ruzha uye kumisa kukanganiswa. Unowana zviratidzo zvakajeka uye kuverenga kwakareba. Nguva dzose shandisa pasi rakasimba kuti uite zviri nani.
Ndingaderedza sei kupindira muRFID system yangu?
Shandisa chidziviriro chakakomberedza nzvimbo dzinonzwa kurwadza.
Chengetedza ma trace edhijitari neRF akasiyana.
Edza system yako munzvimbo chaidzo kuti uwane nekugadzirisa matambudziko eruzha.
